package client.net.sf.saxon.ce.value;
import client.net.sf.saxon.ce.expr.XPathContext;
import client.net.sf.saxon.ce.tree.util.FastStringBuffer;
import client.net.sf.saxon.ce.om.StandardNames;
import client.net.sf.saxon.ce.trans.XPathException;
import client.net.sf.saxon.ce.type.*;
import client.net.sf.saxon.ce.lib.StringCollator;
import java.util.Arrays;
/**
* A value of type xs:hexBinary
*/
public class HexBinaryValue extends AtomicValue {
private byte[] binaryValue;
/**
* Constructor: create a hexBinary value from a supplied string, in which
* each octet is represented by a pair of values from 0-9, a-f, A-F
*
* @param in character representation of the hexBinary value
*/
public HexBinaryValue(CharSequence in) throws XPathException {
CharSequence s = Whitespace.trimWhitespace(in);
if ((s.length() & 1) != 0) {
XPathException err = new XPathException("A hexBinary value must contain an even number of characters");
err.setErrorCode("FORG0001");
throw err;
}
binaryValue = new byte[s.length() / 2];
for (int i = 0; i < binaryValue.length; i++) {
binaryValue[i] = (byte)((fromHex(s.charAt(2 * i)) << 4) +
(fromHex(s.charAt(2 * i + 1))));
}
typeLabel = BuiltInAtomicType.HEX_BINARY;
}
/**
* Constructor: create a hexBinary value from a given array of bytes
*
* @param value the value as an array of bytes
*/
public HexBinaryValue(byte[] value) {
binaryValue = value;
typeLabel = BuiltInAtomicType.HEX_BINARY;
}
/**
* Determine the primitive type of the value. This delivers the same answer as
* getItemType().getPrimitiveItemType(). The primitive types are
* the 19 primitive types of XML Schema, plus xs:integer, xs:dayTimeDuration and xs:yearMonthDuration,
* and xs:untypedAtomic. For external objects, the result is AnyAtomicType.
*/
public BuiltInAtomicType getPrimitiveType() {
return BuiltInAtomicType.HEX_BINARY;
}
/**
* Decode a single hex digit
*
* @param c the hex digit
* @return the numeric value of the hex digit
* @throws XPathException if it isn't a hex digit
*/
private int fromHex(char c) throws XPathException {
int d = "0123456789ABCDEFabcdef".indexOf(c);
if (d > 15) {
d = d - 6;
}
if (d < 0) {
XPathException err = new XPathException("Invalid hexadecimal digit");
err.setErrorCode("FORG0001");
throw err;
}
return d;
}
/**
* Convert to target data type
*
* @param requiredType an integer identifying the required atomic type
* @return an AtomicValue, a value of the required type; or an ErrorValue
*/
public ConversionResult convertPrimitive(BuiltInAtomicType requiredType, boolean validate) {
switch (requiredType.getPrimitiveType()) {
case StandardNames.XS_HEX_BINARY:
case StandardNames.XS_ANY_ATOMIC_TYPE:
return this;
case StandardNames.XS_STRING:
return new StringValue(getStringValueCS());
case StandardNames.XS_UNTYPED_ATOMIC:
return new UntypedAtomicValue(getStringValueCS());
case StandardNames.XS_BASE64_BINARY:
return new Base64BinaryValue(binaryValue);
default:
ValidationFailure err = new ValidationFailure("Cannot convert hexBinarry to " +
requiredType.getDisplayName());
err.setErrorCode("XPTY0004");
return err;
}
}
/**
* Convert to string
*
* @return the canonical representation.
*/
public CharSequence getPrimitiveStringValue() {
String digits = "0123456789ABCDEF";
FastStringBuffer sb = new FastStringBuffer(binaryValue.length * 2);
for (int i = 0; i < binaryValue.length; i++) {
sb.append(digits.charAt((binaryValue[i] >> 4) & 0xf));
sb.append(digits.charAt(binaryValue[i] & 0xf));
}
return sb;
}
/**
* Get an object value that implements the XPath equality and ordering comparison semantics for this value.
* If the ordered parameter is set to true, the result will be a Comparable and will support a compareTo()
* method with the semantics of the XPath lt/gt operator, provided that the other operand is also obtained
* using the getXPathComparable() method. In all cases the result will support equals() and hashCode() methods
* that support the semantics of the XPath eq operator, again provided that the other operand is also obtained
* using the getXPathComparable() method. A context argument is supplied for use in cases where the comparison
* semantics are context-sensitive, for example where they depend on the implicit timezone or the default
* collation.
*
* @param ordered true if an ordered comparison is required. In this case the result is null if the
* type is unordered; in other cases the returned value will be a Comparable.
* @param collator
* @param context the XPath dynamic evaluation context, used in cases where the comparison is context
* sensitive @return an Object whose equals() and hashCode() methods implement the XPath comparison semantics
*/
public Object getXPathComparable(boolean ordered, StringCollator collator, XPathContext context) {
return (ordered ? null : this);
}
/**
* Test if the two hexBinary or Base64Binaryvalues are equal.
*/
public boolean equals(Object other) {
return other instanceof HexBinaryValue && Arrays.equals(binaryValue, ((HexBinaryValue)other).binaryValue);
}
public int hashCode() {
return Base64BinaryValue.byteArrayHashCode(binaryValue);
}
}
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is “Incompatible With Secondary Licenses”, as defined by the Mozilla Public License, v. 2.0.